Melanotic nerve sheath tumor of the gasserian ganglion and trigeminal nerve

Quencer, R M; Stokes, N. J.; Wolfe, David; Lk, Page

doi:10.2214/ajr.133.1.142

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…In our literature review we only found 17 articles describing 18 cases of intracranial MS (►Table 1). 1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Mean age at presentation was 36.3 years (range: 11-77 years), with a strong male predominance (male-to-female ratio: 13:3). MSs mainly occur sporadically, but less frequently they may present as a manifestation of NF II or CC.…”

Section: Resultsmentioning

confidence: 99%

“…On CT, MSs appear as hyperdense lesions that may contain calcifications. 15,16,48,56 On MRI they usually appear hyperintense on T1-weighted images and iso-to hypointense on T2-weighted images because of the intracellular storage of melanin. 20,45,48 Paramagnetic effects may vary according to the degree of melanin content of the lesion.…”

Section: Immunohistochemistrymentioning

confidence: 99%

“…1 Craniofacial and intracranial lesions are extremely rare. 1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Peak incidence is in young adults, without any sex predilection. 1,19,20 Growing pattern is usually as a single lesion, but multiple nodules have also been described.…”

Section: Introductionmentioning

confidence: 99%

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Intracranial Melanotic Schwannomas

Spina

Gagliardi

Boari

et al. 2015

J Neurol Surg A Cent Eur Neurosurg

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Radical surgical resection is considered the treatment of choice for MS, but treatment guidelines still do not exist. Radiotherapy seems to play an important role in reducing the risk of recurrence in the case of subtotal tumor resection. Despite the reported encouraging results, only anecdotal data are available in the pertinent literature. Future studies should focus on the role of radiotherapy as adjuvant treatment when radical surgical excision cannot be achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Immunohistochemistrymentioning

confidence: 99%

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Intracranial Melanotic Schwannomas

Spina

Gagliardi

Boari

et al. 2015

J Neurol Surg A Cent Eur Neurosurg

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“…Recurrence and metastases are observed 20 years after diagnosis. Furthermore, intracranial topography presents a higher risk [789]. The main site of metastasis is the lung.…”

Section: Discussionmentioning

confidence: 99%

Intracranial Melanotic Schwannomas: Rare and Distinctive Tumors to Know Due to their Risk of Recurrence and Metastases

Collart

Vandeponseele

Bosschaert

2018

Journal of the Belgian Society of Radiology

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Melanotic schwannomas are rare nerve sheath tumors that differentiate themselves from classical schwannomas by harboring melanin-producing cells. Intracranial localizations are uncommon, especially on the Gasserian ganglion. We performed a literature review, presenting imaging characteristics, differential diagnosis, and immunohistochemical features for identification. These tumors carry the risk of recurrence and metastases. The prognosis is uncertain. We discuss recommendations for diagnosis and treatment.

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“…If needed, the possibility for further tumor removal is given. The discussed approaches Benign Schwannoma [61] Benign melanotic schwannoma [99] Xanthoma [100] Lipoma [61] Neuromuscular hamartoma [33] Hemangioblastoma [27] Cavernous hemangioma [63] Pituitary adenoma [63] Malignant Malignant peripheral nerve sheet tumor [63] Primary Nasal glioma [25] Atypical teratoid-rhabdoid [20] Intradural chordoma [15] Chondrosarcoma [63] Paraganglioma [30] Rhabdomyosarcoma […”

Section: Decision-makingmentioning

confidence: 99%

Access to Meckel’s cave for biopsies of indeterminate lesions: a systematic review

et al. 2020

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Accessing Meckel's cave (MC) is surgically challenging. Open approaches are complex and often correlated with high morbidity. Endoscopic approaches emerged in the last decade as feasible alternatives to open approaches, especially for sampling indeterminate lesions. This article first analyses available routes to approach Meckel's cave and presents furthermore an illustrative case. We conducted a systematic review and reported according to the guidelines for preferred reporting items for systematic reviews and meta-analyses (PRISMA). Various surgical approaches identified through the search are evaluated and discussed in detail. Additionally, we report on a case of woman with a lesion in MC, which was accessed through an endoscopic transpterygoid approach subsequently diagnosed as a diffuse large B cell lymphoma. Our search delivered 75 articles that included case reports (n = 21), cadaveric studies (n = 32), clinical articles (n = 16), review of the literatures (n = 3), as well as technical notes (n = 2) and a radiological manuscript (n = 1). Open routes included lateral approaches with many variations, mainly intra-and extradural pterional approaches and anterior petrosal, as well as a retrosigmoid intradural suprameatal and a lateral transorbital approach. Endoscopically, MC was reached via approaches that included transpterygoid, transorbital or infraorbital fissure routes. Percutaneous approaches, e.g. through the foramen ovale, were also described. Multiple surgical approaches to MC are currently available. Their different characteristics as well as individual patient factors, such as clinical history and the localization of the disease, have to be considered when choosing a surgical corridor. Studies included in this review highlight the endonasal endoscopic transpterygoidal technique as an excellent corridor for biopsies in the ventral MC.

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Melanotic nerve sheath tumor of the gasserian ganglion and trigeminal nerve

Cited by 14 publications

References 7 publications

Intracranial Melanotic Schwannomas

Intracranial Melanotic Schwannomas

Intracranial Melanotic Schwannomas: Rare and Distinctive Tumors to Know Due to their Risk of Recurrence and Metastases

Access to Meckel’s cave for biopsies of indeterminate lesions: a systematic review

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